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SMT Flyback Transformers for
TI TPS23753 PoE Interface

  • Improved versions of the HA3801-AL, HA3802-AL and HA3803-AL. See HA380x-AL.
  • Developed for Texas Instruments TPS23753 for use at 125 kHz.
  • Windings optimized for hiccup overload protection
  • 1500 Vrms, one minute isolation, primary and bias to secondary
  • RoHS-compliant. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations

SPECIFICATIONS


Part number1
Click to get parts
L at 0A2
±10%
(µH)
L at Ipk3
min
(µH)
DCR max4
(Ohms)
(Ohms)
Leakage
L max (µH)5
Turns ratio6 Ipk3
(A)
Output7
pri drive pri : sec pri : drive pri : bias
HA3801-BL_ 166.5 150.0 0.735 (pri)
0.0270 (sec)
0.510 (drive)
1.05 (bias)
2.50 0.41 1 : 0.154 1 : 0.27 1 : 0.50 1.2 3.3 V, 3 A
HA3802-BL_ 150.0 135.0 0.520 (pri)
0.0275 (sec)
0.560 (drive)
0.88 (bias)
1.9 0.40 1 : 0.25 1 : 0.31 1 : 0.44 1.2 5 V, 2 A
HA3803-BL_ 166.5 150.0 0.760 (pri)
0.103 (sec)
0.475 (drive)
1.10 (bias)
1.8 0.25 1 : 0.50 1 : 0.25 1 : 0.50 1.2 12 V, 0.83 A
1 When ordering, please specify termination code: e.g. HA3803-BLD
  Termination: L = RoHS compliant tin-silver over tin over nickel over phos bronze
Special order, added cost: T = RoHS tin-silver-copper (95.5/4/0.5) or
S
= non-RoHS tin-lead (63/37).
Packaging: D = 13" reel, machine-ready 
EIA-481 embossed plastic tape (200 parts per full reel).
B = Less than full reel
In tape, but not machine-ready. To have a leader and trailer added ($25 charge), use code letter D instead.
2 Inductance is for the primary, measured at 100 kHz, 1.0 Vrms, 0 A.
3 Ipk: Peak primary current drawn at minimum input voltage.
4 DCR for the secondary is with windings connected in parallel measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance for the primary is with the secondary and drive windings shorted; leakage inductance for the drive winding is with the secondary windings shorted.
6 Turns ratio is with the secondary windings connected in parallel.
7 Output of the secondary is with the windings connected in parallel. 10 W output from 36 – 57 V PoE input or 24 V adapter; 6 W output from 12 V adapter. Bias winding output is 12 V, 20 mA.
8 Ambient temperature range: −40°C to +125°C
9 Storage temperature range: Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
10 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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Updated: October 30, 2017